Timber structure for mines



(No Model.)

" G. J. GOODI-IUE'.

TIMBER STRUCTURE FOR MINES. No. 358,261. Patented Feb. 22, 1887. v

B3]|L l I r I fl nul Wflzssas mwzm UNITED STATES "PATENT OFFI E.

GEORGE J. GOODHUE, OF STEVENS POINT, ASSIGNOR OF ONE-HALF TO HARVEY; M. VADLEIGH, OF HATLEY, XVISCONSIN.

TlMBER STRUCTURE FOR MINES.

SPECIFICATION forming part of Letters Patent No. 358,261; dated February 22, 1887.

V H Application filed September 9', 1886. Serial No. 213,089. (No model.)

To. all whom it may concern.-

Beit known that l, GEORGE J. GOODHUE, of .Stevens Point, in the county of Portage, and in the State of Wisconsin, have invented certain new and useful Improvements in Timber Structures for Mines; and I do hereby declare that the following is a full, clear, and exact description thereof. I

My invention relates to timber structures for mines; and it consists in certain peculiarities of construction and combination of parts, as will be hereinafter described with reference to the accompanying drawings, in which-- Figure 1 represesents a side elevation of a structure embodying my invention; Fig. 2, a plan view of the same; Fig. 3, a detail view of a leg; Figs. 4, 5, and 6, detail views of a cap; and Fig. 7, a detail of another form of leg employed in my structure.

In the ordinary mode of mining, a shaft is first sunk, and at various depths suitable drifts are started therefrom. A drift is first chambered out to form a space, ordinarily about eight feet square, (more or less,) as may be found necessary or desirable, and upon the floor of said drift are set timbers A, and at each corner of the chamber a leg, B, is set upon these timbers. The chambering out is continued through the drift and from each side thereof, timbers and legs being added from time to time as the work proceeds. The tops of the legs are connected by caps O, and the work carried on in an upward direction, ad ditional legs and caps being added as the excavation proceeds, in order to shore up the mlne. I

The legs B are provided with gudgeons a, and these latter are preferably round, though in some instances the same may be square.

In my invention I prefer to make the caps O of round timber, in order to gain additional strength, and the respective ends of each cap are suitably cut away to form top and bottom arc-shaped shoulders b b, thereby leaving tongues c, that are also cut away to form recesses d, and the sides of these tongues are beveled off at about an angle of forty-five degrees, as shown at e. The recesses d maybe either concave or square, according to the form of the gudgeons a on the legs B; and, if desirable, said recesses and gudgeons may be \Vhen the several caps are in position, the

arc-shaped shoulders 6 form a circular seat just above and in line with each leg, on which the tongues 0 rest, thus providing a secure bearing for the next succeeding leg, and the spaces formed by the recessed ends of said tongues form sockets to receive the lower gudgeon on the latter leg.

Like the caps, I prefer to make the legs of round timber, and in case such-timber varies in diameter I cut away the ends of the larger legs to form circular shouldersf, as shown by Fig. 7, in order to permit a close fit of the tongues on said caps, these tongues being of uniform size and both parts B O shapedby suitable machinery.

The advantages derived by the construction of parts above described are as follows: The shoulders of the caps bearing against the body of the legs, the strain is on said body-portion and not on the gudgeons, as is ordinarily the case in the structures now in use, and hence there is no breaking of these gudgeons and consequent dislocation of said legs and caps. The ends of the caps being all uniform, there is no trouble in fitting the same to the legs, and the adjacent ends of the several caps being miter-joined when in position, the pressure that may be exerted in one direction is met with a resistance in all other directions.

Another advantage of my invention lies in the fact that all the parts necessary to my structure are made by machinery, and can consequently be turned out with greater rapidity and at a less cost than is ordinarily the case.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a timber structure for mines, the combination, with suitable legs, of caps having their respective ends cut away to form upper and lower shoulders and beveled tongues, substantially as and for the purpose set forth.

2. In a timber structure for mines, the C0111- bination, with suitable legs having gudgeons at their extremities, of caps having their respective ends cut away to form upper and lower shoulders and beveled tongues, the latter having their ends suitably recessed to fit said gudgeons, substantially as and for the purpose set forth.

3. In a timber structure for mines, the 00111- bination, with round legs having circular gudgeous at their extremities, of caps cut away at their respective ends to form upper and lower shoulders and beveled tongues, the latter having concave recesses in their ends to fit said gudgeons, substantially as and for the purpose set forth.

4. In a timber structure for mines, the combination, with legs having their extremities cut away to form shoulders, of caps having their respective ends cut away to form upper 2 5 and lower shoulders and beveled tongues, substantially as and for the purpose set forth.

I testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of \Visconsin, 0 in the presence of two witnesses.

GEORGE J. GOODHUE.

Witnesses:

H. G. UNDERWOOD, N. E. OLIPHANT. 

